Coucou

by Louis Raillé

A tiny mascot in your Mac's notch that watches your coding agents and lets you approve them in one tap.

5,007 stars GitHub MIT FreeOpen sourceLocal

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What it does

Tracks Claude Code, Codex, Cursor, Gemini CLI, OpenCode, Hermes… live and handles permissions (Allow / Deny)
iPhone app (TestFlight beta: Live Activity, Face ID); Windows, Linux and Android (build from source) too
No telemetry, no account; code is MIT, but the name and Mochi are reserved

! Windows installers are unsigned (SmartScreen warns). Coucou installs hooks into your agents' config (with backup and diff): check before accepting. Very recent project (late September 2026), very active.

Install it

Requirements: macOS 15+, Windows 10/11 or Linux x86_64.

macOS: download Coucou.zip from Releases, drag it to Applications

https://github.com/Louis-CFM/coucou/releases

Linux (Debian/Ubuntu), after downloading the .deb

sudo apt install ./Coucou-Linux-*.deb

The prompt for your agent

Paste it into your coding agent: it checks the requirements and installs it for you.

Claude CodeCodexCursorGemini CLIopencode

Prompt

Install Coucou (https://github.com/Louis-CFM/coucou) on my machine.
1. Check the requirements: macOS 15+, Windows 10/11 or Linux x86_64. If anything is missing, tell me before installing anything.
2. Follow the official method:
- see https://github.com/Louis-CFM/coucou/releases
- Linux (Debian/Ubuntu), after downloading the .deb: sudo apt install ./Coucou-Linux-*.deb
3. Check that it works, then explain how to launch it and where to start.

Always review what your agent is about to run, especially install commands.